<template>
    <div>
        <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
            </el-col>
        </el-row>
        <el-table :data="rolesList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1 === 0? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <el-row :class="[i2 === 0? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <!-- 渲染二级权限 -->
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <!-- 渲染三级权限 -->
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable 
                                    @close="removeRightById(scope.row,item3.id)">{{ item3.authName }}</el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" prop="level">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>
    <!-- 展示分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="40%" 
    @close="setRightDialogClosed">
        <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox 
      node-key="id" default-expand-all :default-checked-keys="defKeys" 
      ref="treeRef">

      </el-tree>
      <!-- 对话框底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="40%" @close="addDialogClosed">
      <!-- 内容主题区域 -->
      <el-form :model="addForm" :rules="addFromRules" ref="addFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName" >
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 对话框底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="40%" @close="editFormRulesDialogClosed">
      <!-- 内容主题区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="eidtRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            // 角色列表
            rolesList: [],
            // 控制添加角色对话框的显示与隐藏
            addDialogVisible: false,
            // 添加角色的表单数据
            addForm:{
                roleName:'',
                roleDesc:''
            },
            // 添加角色表单验证规则对象
            addFromRules: {
                // 验证角色名是否被合法
                roleName: [
                { required: true, message: '请输入用户名', trigger: 'blur' }
                ],
                // 验证角色描述是否合法
                roleDesc: [
                { required: true, message: '请输入密码', trigger: 'blur' }
                ]
            },
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            // 修改角色的表单数据
            editForm:{},
            editFormRules: {
                // 验证角色名是否被合法
                roleName: [
                { required: true, message: '请输入用户名', trigger: 'blur' }
                ],
                // 验证角色描述是否合法
                roleDesc: [
                { required: true, message: '请输入密码', trigger: 'blur' }
                ]
            },
            // 控制分配权限对话框显示与隐藏
            setRightDialogVisible: false,
            // 树形结构权限列表
            rightsList: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId:''
        }
    },
    created(){
        // 获取所有的角色
        this.getRolesList()
    },
    methods:{
        // 获取角色列表
        async getRolesList(){
            const {data: res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolesList = res.data
            console.log(this.rolesList)
        },
        // 监听添加用户对话框关闭事件
        addDialogClosed () {
        this.$refs.addFormRef.resetFields()
        },
        addRole(){
            this.$refs.addFormRef.validate(async valid => {
            // console.log(valid)
            if (!valid) return
            // 可以发起添加用户的网络请求
            const { data: res } = await this.$http.post('roles', this.addForm)
            if (res.meta.status !== 201) {
            this.$message.error('添加角色失败')
            }
            this.$message.success('添加角色成功')
            // 隐藏添加用户的对话框
            this.addDialogVisible = false
            // 刷新列表
            this.getRolesList()

      })
    },
    // 打开修改角色数据对话框
    async showEditDialog(id){
        console.log(id)
        const{data: res} = await this.$http.get('roles/'+id)
        if(res.meta.status !== 200){
            return this.$message.error('获取角色数据失败')
        }
        this.editForm = res.data
        this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editFormRulesDialogClosed(){
        this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    eidtRoleInfo(){
        this.$refs.editFormRef.validate(async valid => {
            console.log(valid)
            if(!valid) return 
            // 可以发起修改角色的网络请求
            const { data: res } = await this.$http.put('roles/'+this.editForm.roleId, {
                roleName: this.editForm.roleName,
                roleDesc: this.editForm.roleDesc
            })
            if (res.meta.status !== 200) {
            this.$message.error('角色修改失败')
            }
            // 隐藏修改角色的对话框
            this.editDialogVisible = false
            // 刷新列表
            this.getRolesList()
            // 修改成功提示
            this.$message.success('修改角色成功')
        })
    },
    // 根据id删除对应的信息
    // 根据Id删除对应的角色信息
    async removeRoleById(id){
        // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }

      this.$message.success('删除角色成功！')
      this.getRolesList()
    },
    //根据id删除对应的权限
    async removeRightById(role,rightId){
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status !== 200){
          return this.$message.error('删除权限失败')
      }
    //   this.getRolesList()
    role.children = res.data
     },
    //展示分配权限的对话框
    async showSetRightDialog(role){
        this.roleId = role.id
        const {data: res} = await this.$http.get('rights/tree')
        if(res.meta.status !== 200){
            return this.$message.error('获取权限失败')
        }
        // 获取得到的权限数据，保存到data中
        this.rightsList = res.data

        // 递归获取三级节点id
        this.getLeafKeys(role,this.defKeys)

        this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色下所有三级权限的id，并保存到defKeys的数组当中
    getLeafKeys(node,arr){
        // 如果当前node节点不包含children属性，则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        // 如果不是三级节点
       node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
        this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights(){
        const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        // console.log(keys)
        const idStr = keys.join(',')

       const {data: res}  = await this.$http.post(`roles/${this.roleId}/rights`,{
            rids:idStr
        })

        if(res.meta.status !== 200){
            return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>
